Finding the Third Proportional to 31,243.50 and 63,648

Step by Step Solution

1. Step 1: Write the proportion equation
   31,243.50 : 63,648 = 63,648 : x
2. Step 2: Convert to fraction form
   31,243.50/63,648 = 63,648/x
3. Step 3: Cross multiply
   31,243.50x = 63,648 × 63,648
4. Step 4: Simplify right side
   31,243.50x = 4,051,067,904
5. Step 5: Solve for x
   x = 4,051,067,904/31,243.50
6. Step 6: Final answer
   x = 129,661.14